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Topic: road bike sizing

Posted on: 27th Jul 2011 7:08 PM    Quote and Reply

hi all!

I am thinking of getting my first roadie, but was thinking of getting it online ( because it appears to be significantly cheaper then those in the shops)

But I am not too sure about what size bike should I get, I am 160 with an inseam of 73 cm

also because I am a girl, I have no idea whether to get a small men's bike or to get a female's bike

Help!
Freshie Forumer
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Posted on: 27th Jul 2011 7:43 PM    Quote and Reply


Quote:
"Formerly posted by iceternity: hi all!

I am thinking of getting my first roadie, but was thinking of getting it online ( because it appears to be significantly cheaper then those in the shops)

But I am not too sure about what size bike should I get, I am 160 with an inseam of 73 cm

also because I am a girl, I have no idea whether to get a small men's bike or to get a female's bike

Help! :D"


Have you checked cost of shipping to Spore ?  Bikes are cheaper provided they deliver within the country.
Bec the overall cost may work out to be the same or higher as compared to getting it local.

Bike delivered overseas may not be tuned for riding, so you still have to tune it yourself or bring to bikeshop where there are charges.

For your case, it is better to actually mount over the bike in a bikeshop and see if you have sufficient clearance at the toptube.  Better not trust measurement unless you have check out the physical bike here and then buy the same online.  You will not want to send bike back to UK or US if size is not right.


Regular Forumer
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Posted on: 27th Jul 2011 9:10 PM    Quote and Reply


If your really new to cycling I would reccomend buying from your local shop (assuming they are a decent shop). You should end up with a bike that fits your frame and is suited to your needs, and any issues or future repairs/maintenance is easily dealt with. You may pay a bit more (and unless you really know what your looking for, you probably wont save much online) but hopefully you will end up a happier cyclist...hope it works out for you.

Regular Forumer
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Posted on: 27th Jul 2011 10:15 PM    Quote and Reply


Thanks for all the replies it really helped me out,

I understand that fitting a road bike is quite tough because of all the geometry, arm length knee length, and things like that thats why I am quite apprehensive about getting it online as well, but i really can't seem to find an economical road bike here in singapore even if it is second hand. Also because it is hard to find smaller second hand bicycles ( im quite short i think ).

cost wise getting it online seemed like a more viable option, because including shipping it would not exceed 600 SGD  on top of that the specs of the bicycle is rather decent for it's price, not fantastic but the value for money is there.

I was considering walking into one of those specialised shops and pretending i was going to buy to get a fitting :/ but i felt bad. Any ideas where I can get a second hand entry level road

these are the specifications of the bicycle that i saw online, It's brand sounds extremely foreign to me though, its a Giordano Libero 1.6


  • Weight: 24 pounds

  • 6061 Aluminum with Replaceable Derailleur Hanger

  • Fork: High-tensile steel

  • Top Tube: 54 centimeters

  • Dual water bottle mounts

  • Wheels: Rims - Vitesse alloy 700c 32 Hole High V-Profile Silver

  • Hubs: Alloy 32 hole front and rear with quick release

  • Tires: 700 by 25 black road clincher

  • Brakes: Alloy side pull front and rear

  • Shifters: Shimano ST2300 STI 16 speed with integrated brake levers

  • Rear Derailleur: Shimano RD2300

  • Front Derailleur: Shimano FDAO50

  • Handlebars: Alloy 40cm c/c

  • Stem: Uno Alloy threadless 1 1/8 100mm x -10 deg

  • Headset: Steel threadless 1 1/8

  • Saddle: Velo road

  • Rails: Steel

  • Seat Post: 27.2 x 300mm alloy

  • Pedals: VP plastic body with alloy cages

  • Seatpost Clamp: Alloy black

  • Cassette: Shimano CS HG30 8 Speed 11-30

  • Crank: Prowheel Alloy Arms 170mm 42/52



as for tuning, i do own a diamondback insight as well as a GT avalanche 2.0 and sometimes i do tune my gears and breaks myself, :/ the derailers are more or less the same right?


Freshie Forumer
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Posted on: 27th Jul 2011 10:59 PM    Quote and Reply


Quote:
"Formerly posted by iceternity: Thanks for all the replies it really helped me out,

I understand that fitting a road bike is quite tough because of all the geometry, arm length knee length, and things like that thats why I am quite apprehensive about getting it online as well, but i really can't seem to find an economical road bike here in singapore even if it is second hand. Also because it is hard to find smaller second hand bicycles ( im quite short i think ).

cost wise getting it online seemed like a more viable option, because including shipping it would not exceed 600 SGD  on top of that the specs of the bicycle is rather decent for it's price, not fantastic but the value for money is there.

I was considering walking into one of those specialised shops and pretending i was going to buy to get a fitting :/ but i felt bad. Any ideas where I can get a second hand entry level road

these are the specifications of the bicycle that i saw online, It's brand sounds extremely foreign to me though, its a Giordano Libero 1.6


  • Weight: 24 pounds

  • 6061 Aluminum with Replaceable Derailleur Hanger

  • Fork: High-tensile steel

  • Top Tube: 54 centimeters

  • Dual water bottle mounts

  • Wheels: Rims - Vitesse alloy 700c 32 Hole High V-Profile Silver

  • Hubs: Alloy 32 hole front and rear with quick release

  • Tires: 700 by 25 black road clincher

  • Brakes: Alloy side pull front and rear

  • Shifters: Shimano ST2300 STI 16 speed with integrated brake levers

  • Rear Derailleur: Shimano RD2300

  • Front Derailleur: Shimano FDAO50

  • Handlebars: Alloy 40cm c/c

  • Stem: Uno Alloy threadless 1 1/8 100mm x -10 deg

  • Headset: Steel threadless 1 1/8

  • Saddle: Velo road

  • Rails: Steel

  • Seat Post: 27.2 x 300mm alloy

  • Pedals: VP plastic body with alloy cages

  • Seatpost Clamp: Alloy black

  • Cassette: Shimano CS HG30 8 Speed 11-30

  • Crank: Prowheel Alloy Arms 170mm 42/52



as for tuning, i do own a diamondback insight as well as a GT avalanche 2.0 and sometimes i do tune my gears and breaks myself, :/ the derailers are more or less the same right?


"



54 CM Top Tube is too big for you. 

Regular Forumer
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Posted on: 30th Jul 2011 3:55 PM    Quote and Reply


U can get a caculated fit here http://www.competitivecyclist.com/za/CCY?PAGE=FIT_CALCULATOR_INTRO

and 54cm toptube will be way too big.

I m 169 and currently using a 49cm frame with 51.8 toptube. But it's kinda small for me. Do look out for 46/49cm for ur size.

Freshie Forumer
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Riding:
Posted on: 31st Jul 2011 7:53 AM    Quote and Reply


That is most likely an incorrect/improper bike fit. I believe most ladies of that height would find size 50 a threshold size to struggle with. I suggest you do some more research in internet, or go to another bike shop for bike fitting.

Regular Forumer
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Posted on: 31st Jul 2011 11:54 PM    Quote and Reply


At 1.6m, and a 73cm inseam ( which means you've got long legs and a short torso), you're probably looking at a bike with an 'effective top-tube length' of less than 52cm. Probably 51.5cm if 700C wheels is what you're getting. As that's about the limit of how small a 700c wheeled frame will go without too many issues.

Seat-tube C-to-C height is not an issue as most bikes with such a size will be at the most 48cm for 'standard' horizontal top-tube frames.  But 'compact' geometry will work better. 

As for 'economical' it really depends on what's your budget. A $800-$1000 complete road bike is totally possible. Just whether you can get one in your size.

Try dropping by Rodalink and enquire about their Helios 200 or 300 bikes. They do have it in sizes that will fit you. That is 46 and 48. And should come in around the price range or less. 

Lor Sor Forumer
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Singapore
Posted on: 28th Mar 2018 9:18 PM    Quote and Reply


http://thebicyclesguide.com/road-bike-reviews/ here is very simple and most accurate chart to find the right bike size, i hope it will help... Thanks

Freshie Forumer
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Posted on: 19th Apr 2018 10:31 AM    Quote and Reply


fitting a road bike is quite tough because of all the geometry, arm length knee length


run 3 unblocked, 192.168.0.1 gateway
Freshie Forumer
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Posted on: 22nd Jul 2019 12:32 PM    Quote and Reply


Despite all the charts and calculations, we still need to road test the bicycle for bike fit. Not all manufacturers are updated on their own bike fit charts, and there are this women specific bike sizing to look out. Then there are: competition, leisure, utility, usage based geometry. Nothing beats test-cycling the bicycle yourself.

Regular Forumer
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